working final? import warnings

main.py

@@ -11,33 +11,33 @@ app = Window(root)
 
 def add_base():
     out = []
-    for x in baseDropdown['values']:
+    for x in baseList['values']:
         out.append(int(x))
     try:
         if not int(baseInput.get()) in out:
             out.append(int(baseInput.get()))
-        baseDropdown['values'] = sorted(out)
+        baseList['values'] = sorted(out)
         functionTrigger(0,0,0) # Trigger number conversion if a base is added
     except ValueError:
-        print("Not a valid base!")
-        lbl1 = Label(root, text="\nInvalid base!", font=("Arial", 12))
-        lbl1.grid(column=1, row=0)
+        listOut.delete(0,listOut.size())
+        listOut.insert(END, "Not a valid base!")
 
 def functionTrigger(a,b,c): # Positional arguments from the trace are not needed for this program, but still must be defined
     input = numberInput.get()
-    base = int(baseDropdown['values'][baseDropdown.current()]) # Retreive the current selected base
+    base = int(baseList['values'][baseList.current()]) # Retreive the current selected base
     baseConverter(input, base)
 
 def baseConverter(userInput, numberBase):
     try:
         decimalNum = int(userInput,numberBase) # First attempt to get the number in decimal.
     except:
-        print("Number entered does not match the base!")
+        listOut.delete(0,listOut.size())
+        listOut.insert(END, "Number entered does not match the base!")
         return
     
-    outputText = ""
-    for base in baseDropdown['values']: # Iterate through all bases
-        outputText += "Base " + base + ": "
+    listOut.delete(0,listOut.size())
+    for base in baseList['values']: # Iterate through all bases
+        outputText = "Base " + base + ": "
         outputNumber = ""
         tempNum = decimalNum
         while tempNum > 0:
@@ -48,9 +48,9 @@ def baseConverter(userInput, numberBase):
             else: # Alphanumeric characters needed
                 outputNumber += chr(55 + digit) # ASCII character offset for capital letters
         outputNumber = outputNumber[::-1]
-        outputText += outputNumber + "\n"
-    lblOut = Label(root, text=outputText, font=("Arial", 12))
-    lblOut.grid(column=0, row=7)
+        outputText += outputNumber
+        listOut.insert(END, outputText)
+        
 
 root.wm_title("Numerical converter")
 
@@ -75,10 +75,10 @@ separator1.place(relx=0, rely=0.2, relwidth=1, relheight=1)
 separator2 = Separator(root, orient='horizontal')
 separator2.place(relx=0, rely=0.43, relwidth=1, relheight=1)
 
-baseDropdown = Combobox(root)
-baseDropdown['values']= (2, 10, 16)
-baseDropdown.current(1) #set the selected item
-baseDropdown.grid(column=1, row=4)
+baseList = Combobox(root, width='10')
+baseList['values']= (2, 10, 16)
+baseList.current(1) #set the selected item
+baseList.grid(column=1, row=4)
 lbl3 = Label(root, text="\nNumber Base \n of the input:\n", font=("Arial", 12))
 lbl3.grid(column=0, row=4)
 
@@ -94,9 +94,12 @@ lbl4.grid(column=0, row=6)
 lbl5 = Label(root, text="", font=("Arial", 12))
 lbl5.grid(column=50, row=5)
 
-lblOut = Label(root, text="rtedgh", font=("Arial", 12))
-lblOut.grid(column=0, row=7)
+
+listOut = Listbox(root, selectmode='SINGLE', width=50)
+listOut.grid(column=0, row=7, columnspan=3)
+
+
 
 root.resizable(False, False)
-root.geometry('600x400')
+root.geometry('325x400')
 root.mainloop()